A report by a group of MPs has said that the drink-drive limit should be lowered to "effectively zero".
But they added that the chances of that happening anytime in the near future are remote as the reduction is "too great a step at this stage".
Currently, the drink-drive limit is 80mg of alcohol per 100ml of blood.
The House of Commons Transport Committee said that the Government should aim for a reduction to 20mg in the long-term, something that may pleasecar insurance companies.
The group said that amount was "effectively zero", adding that any reduction in the limit should occur after the Government has run a campaign highlighting the dangers of drinking and driving,and the effects that drink strengths can have on the body.
The report said there was "little evidence to suggest the public would support such a drastic, immediate change in the law".
The committee also said that instead of an "interim" reduction to 50mg, the Government should concentrate on working with individual police forces to achieve a stricter enforcement of the current limit.
The MPs also called on the police to be given additional powers to breath test drivers in the course of a designated drink-drive enforcement operation. Currently, police may stop any vehicle but can only test the driver's breath if there is an element of suspicion.
The report said: "We are concerned that a reduction in the limit to 50mg would send out a mixed message with the Government's official advice to not drink and drive at all, particularly in light of the strong evidence of public uncertainty about what constitutes a 'legal drink'.
"In the long-term, we believe that the Government should aim for an "effectively zero" limit of 20mg but we acknowledge that is too great a step at this stage."
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